1. superlative form of prissy; most excessively proper, formal, or prudish in manner or appearance
Usage: informal; often used critically or humorously

Examples

• She wore the prissiest outfit to the casual beach party.
• His prissiest mannerisms made him seem uncomfortable around the other kids.
• The prissiest member of the group refused to participate in the silly game.
• That was the prissiest response I've ever heard to a harmless joke.
• She had the prissiest way of correcting everyone's grammar at dinner.